<template>
  <div>
    <TypeNav />
    <!-- 购物车列表 -->
    <div class="cart">
      <h4>全部商品</h4>
      <div class="cart-main">
        <!-- 购物车头部 -->
        <div class="cart-th">
          <div class="cart-th1">全部</div>
          <div class="cart-th2">商品</div>
          <div class="cart-th3">单价（元）</div>
          <div class="cart-th4">数量</div>
          <div class="cart-th5">小计（元）</div>
          <div class="cart-th6">操作</div>
        </div>
        <!-- 购物车内容 -->
        <div class="cart-body">
          <ul class="cart-list" v-for="item in cartInfoList" :key="item.id">
            <!-- 选中框 -->
            <li class="cart-list-con1">
              <input type="checkbox" name="chk_list" :checked="item.isChecked === 1" @change="changeChecked(item.skuId, item.isChecked)" />
            </li>
            <!-- 商品名称 -->
            <li class="cart-list-con2">
              <img :src="item.imgUrl" />
              <div class="item-msg">{{ item.skuName }}</div>
            </li>
            <!-- 简介 -->
            <li class="cart-list-con3">
              <div class="item-txt">{{ item.sourceType }}</div>
            </li>
            <!-- 商品价格 -->
            <li class="cart-list-con4">
              <span class="price">{{ item.skuPrice }}</span>
            </li>
            <!-- 数量 -->
            <li class="cart-list-con5">
              <a href="javascript:void(0)" class="mins" @click="changeNum('sub', item)">-</a>
              <input autocomplete="off" type="text" minnum="1" class="itxt" :value="item.skuNum" @blur="changeNum('input', item, $event)" />
              <a href="javascript:void(0)" class="plus" @click="changeNum('add', item)">+</a>
            </li>
            <!-- 小计  -->
            <li class="cart-list-con6">
              <span class="sum">{{ item.skuPrice * item.skuNum }}</span>
            </li>
            <!-- 操作 -->
            <li class="cart-list-con7">
              <a class="sindelet" @click="deleteSku(item.skuId)">删除</a>
              <br />
              <a href="#none">移到收藏</a>
            </li>
          </ul>
        </div>
      </div>
      <!-- 购物车底部 -->
      <div class="cart-tool">
        <div class="select-all">
          <input class="chooseAll" type="checkbox" :checked="allInput" @click="changeAllInput($event)" />
          <span>全选</span>
        </div>
        <div class="option">
          <a @click="deletecheckedgoods">删除选中的商品</a>
          <a>移到我的关注</a>
          <a>清除下柜商品</a>
        </div>
        <div class="money-box">
          <div class="chosed">
            已选择 <span>{{ allInfo }}</span
            >件商品
          </div>
          <div class="sumprice">
            <em>总价（不含运费） ：</em>
            <i class="summoney">{{ allPrice }}</i>
          </div>
          <div class="sumbtn">
            <a class="sum-btn" target="_blank" @click="goTrade">结算</a>
          </div>
        </div>
      </div>
    </div>
  </div>
</template>

<script>
import { mapState, mapActions } from 'vuex'
export default {
  name: 'Cart',
  mounted() {
    this.getCartList()
  },
  computed: {
    ...mapState('cart', ['cartInfoList']),
    // 总数量
    allInfo() {
      return this.cartInfoList.reduce((sum, item) => (item.isChecked === 1 ? sum + item.skuNum : sum + 0), 0)
    },
    // 总价格
    allPrice() {
      return this.cartInfoList.reduce((sum, item) => (item.isChecked === 1 ? sum + item.skuNum * item.skuPrice : sum + 0), 0)
    },
    // 全选按钮
    allInput() {
      // 当所有的isCheched都为0时，表示有选项未被选中，返回的时false
      // return this.cartInfoList.filter((item) => item.isChecked === 0).length === 0

      // every全部符合时返回true
      return this.cartInfoList.every((item) => item.isChecked === 1) && this.cartInfoList.length !== 0
    },
  },
  methods: {
    ...mapActions('cart', ['getCartList', 'deleteCartList', 'getCartChecked']),
    // 数量修改
    async changeNum(type, cart, e) {
      const { skuId, skuNum: oldNum } = cart
      let skuNum = 0
      // 减
      if (type === 'sub') skuNum = oldNum <= 1 ? 0 : -1
      // 加
      if (type === 'add') skuNum = 1
      // 自定义
      if (type === 'input') {
        const newNum = e.target.value - 0
        if (newNum < 0 || isNaN(newNum)) return (e.target.value = oldNum)
        skuNum = parseInt(newNum) - oldNum
      }
      // 数量无变化时直接退出
      if (skuNum === 0) return
      await this.$store.dispatch('cart/postCartList', { skuId, skuNum })
      this.getCartList()
    },
    // 删除商品
    async deleteSku(skuId) {
      await this.deleteCartList(skuId)
      await this.getCartList()
    },
    // 更换选中状态
    async changeChecked(skuID, isChecked) {
      await this.getCartChecked({ skuID, isChecked: isChecked === 1 ? 0 : 1 })
      await this.getCartList()
    },
    // 更改全部选中状态
    async changeAllInput(e) {
      const isChecked = e.target.checked ? 1 : 0
      await this.$store.dispatch('cart/getAllCartChecked', isChecked)
      this.getCartList()
    },
    // 删除选中商品
    async deletecheckedgoods() {
      if (this.cartInfoList.filter((item) => item.isChecked === 1).length === 0) return
      await this.$store.dispatch('cart/deletecheckedgoods')
      this.getCartList()
    },
    goTrade() {
      if (!this.allInfo) return
      this.$router.push('/trade')
    },
  },
}
</script>

<style lang="scss" scoped>
.cart {
  width: 1200px;
  margin: 0 auto;
  h4 {
    margin: 9px 0;
    font-size: 14px;
    line-height: 21px;
  }
  .cart-main {
    .cart-th {
      background: #f5f5f5;
      border: 1px solid #ddd;
      padding: 10px;
      overflow: hidden;
      & > div {
        float: left;
      }
      .cart-th1 {
        width: 25%;
        input {
          vertical-align: middle;
        }
        span {
          vertical-align: middle;
        }
      }
      .cart-th2 {
        width: 25%;
      }
      .cart-th3,
      .cart-th4,
      .cart-th5,
      .cart-th6 {
        width: 12.5%;
      }
    }
    .cart-body {
      margin: 15px 0;
      border: 1px solid #ddd;
      .cart-list {
        padding: 10px;
        border-bottom: 1px solid #ddd;
        overflow: hidden;
        & > li {
          float: left;
        }
        .cart-list-con1 {
          width: 4.1667%;
        }
        .cart-list-con2 {
          width: 25%;
          img {
            width: 82px;
            height: 82px;
            float: left;
          }
          .item-msg {
            float: left;
            width: 150px;
            margin: 0 10px;
            line-height: 18px;
          }
        }
        .cart-list-con3 {
          width: 20.8333%;
          .item-txt {
            text-align: center;
          }
        }
        .cart-list-con4 {
          width: 12.5%;
        }
        .cart-list-con5 {
          width: 12.5%;
          .mins {
            border: 1px solid #ddd;
            border-right: 0;
            float: left;
            color: #666;
            width: 6px;
            text-align: center;
            padding: 8px;
          }
          input {
            border: 1px solid #ddd;
            width: 40px;
            height: 32px;
            float: left;
            text-align: center;
            font-size: 14px;
          }
          .plus {
            border: 1px solid #ddd;
            border-left: 0;
            float: left;
            color: #666;
            width: 6px;
            text-align: center;
            padding: 8px;
          }
        }
        .cart-list-con6 {
          width: 12.5%;
          .sum {
            font-size: 16px;
          }
        }
        .cart-list-con7 {
          width: 12.5%;
          a {
            color: #666;
            cursor: pointer;
          }
        }
      }
    }
  }
  .cart-tool {
    overflow: hidden;
    border: 1px solid #ddd;
    .select-all {
      padding: 10px;
      overflow: hidden;
      float: left;
      span {
        vertical-align: middle;
      }
      input {
        vertical-align: middle;
      }
    }
    .option {
      padding: 10px;
      overflow: hidden;
      float: left;
      a {
        float: left;
        padding: 0 10px;
        color: #666;
        cursor: pointer;
      }
    }
    .money-box {
      float: right;
      .chosed {
        line-height: 26px;
        float: left;
        padding: 0 10px;
      }
      .sumprice {
        width: 200px;
        line-height: 22px;
        float: left;
        padding: 0 10px;
        .summoney {
          color: #c81623;
          font-size: 16px;
        }
      }
      .sumbtn {
        float: right;
        a {
          display: block;
          position: relative;
          width: 96px;
          height: 52px;
          line-height: 52px;
          color: #fff;
          text-align: center;
          font-size: 18px;
          font-family: 'Microsoft YaHei';
          background: #e1251b;
          overflow: hidden;
        }
      }
    }
  }
}
</style>
